Difficulty: Medium

Average Score: 55%

Which best explains long-run U.S. productivity growth?

Rationale

Company replaces workers with robots—this illustrates investment in physical capital.

Investing in robots signifies the acquisition of physical capital, which includes tangible assets used in production processes. By substituting workers with machines, the company enhances its productivity and efficiency, showcasing a shift towards mechanization and automation in its operations.

A (Slow pop. growth, inflation, tech) YOUR ANSWER

Human capital refers to the skills, knowledge, and experience possessed by individuals, which can enhance productivity. Replacing workers with robots does not invest in human capital; rather, it diminishes the workforce, suggesting a move away from human skills and capabilities.

B (Steady pop., constant ed., tariffs) YOUR ANSWER

This choice is correct as physical capital encompasses the machinery, tools, and equipment used in production. By replacing human workers with robots, the company is explicitly investing in physical capital to improve efficiency and reduce labor costs.

C (Cheap raw materials, constant ed., IP rules) YOUR ANSWER

Financial assets include stocks, bonds, and other monetary instruments that generate returns. The decision to invest in robots does not relate to acquiring financial instruments but instead focuses on tangible machinery that aids production. Thus, this choice misrepresents the nature of the investment.

D (More capital, better ed., tech advances) CORRECT

Research and Development (R&D) involves the innovation and improvement of products and processes. While robotics may stem from R&D efforts, the act of replacing workers with robots itself is not an investment in R&D. Instead, it is a direct investment in physical capital that applies existing technology rather than developing new solutions.

Conclusion

The company's decision to replace workers with robots illustrates a clear investment in physical capital, highlighting a strategic shift towards automation and increased productivity. This choice emphasizes the importance of tangible assets in modern production processes, distinguishing it from investments in human capital, financial assets, or R&D initiatives.

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